Brew Bubbles Shield

Design by: 4818

This is the printed circuit board design supporting Brew Bubbles.

The shield provides the necessary component connections and circuitry for the ESP-8266 controller used in this project. It is nearly identical in size to the Wemos D1 mini we use to provide a very compact and lightweight footprint.

Please see the documentation for additional information.


  • 3 x C1 0.1μF Ceramic Capacitor (C1-3)
  • *2 x 2.2kΩ 1/4W 5% Axial Resistors (R1-2)
  • 1 x 150Ω 1/4W 5% Axial Resistor (R3)
  • 1 x Sharp GP1A57HR Transmissive Photointerrupter (U1)
  • *2 x 3-pin 90° Male Header (ROOM, VESSEL)
This section of the BOM is available on Mouser via this link.

Additionally, you will need:
  • 1 x Wemos D1 Mini (U2)
  • 2 x 8-Pin stacking male headers (almost always comes with the D1)
  • 2 x 8-Pin stacking female headers (almost always comes with the D1)
  • *2 x Waterproof DS18B20 Temperature Sensor with lead
(*) - Optional items for use when temperature sensors are desired. They are in the design to provide a means to monitor and trend one's ambient temperature where the fermenter is placed, and/or the fermenting liquid's temperature via a thermowell or insulated in contact with the fermenter. If one chooses not to use these, the firmware will automatically skip reporting these readings.

3D-Printed Bracket

See this project on Thingiverse from @matridium (V1) and @gromitdj (v2) on for a bracket you can print

Buying Here

When you purchase this board here, you are paying a small premium (10%) which goes into my account.  That credit is used in the development of these and other projects.  Anyone who has done development like this can tell you how many boards we go through, and the cost is not insignificant.  You may absolutely take the files from GitHub and upload them yourself to avoid that small markup if you choose.  If you do purchase them here, it's only fair I tell you about it, and what I will do with the credits.

Price Varies

5.0 cm x 5.0 cm